I am using zimbra 5.0.18, and i want change the "Undelivered Mail Returned to Sender" message, is there possible to do that?

this is the originally example for "Undelivered Mail Returned to Sender" message :

-----Original Message-----
From: Mail Delivery System [mailto:MAILER-DAEMON@mydomain.com]
Sent: Tuesday, April 09, 2013 9:25 AM
To: abcd@mydomain.com
Subject: Undelivered Mail Returned to Sender

This is the mail system at host mydomain.com.

I'm sorry to have to inform you that your message could not be delivered to
one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own
text from the attached returned message.

The mail system

<1234@mydomain.com>: mydomain.com
any suggestion and help will be greatly appreciated..